Method for removing hydrogen sulfide from carbon disulfide

A carbon disulfide, hydrogen sulfide technology, applied in the direction of carbon disulfide, hydrogen sulfide, carbon-sulfur compounds, etc., can solve the problems of difficulty in realization and complicated adjustment of rectification tower parameters, and achieve the effect of reducing rectification steps and simple operation.

Pending Publication Date: 2022-08-02
NINGXIA UNISPLENDOUR TIANHUA METHIONINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although rectification is a conventional and theoretically mature separation method, in actual operation, the adjustment of the components to be separated, pressure, and temperature changes is cumbersome or even difficult to achieve in a highly integrated rectification column.

Method used

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  • Method for removing hydrogen sulfide from carbon disulfide

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The invention provides the following technical scheme: the carbon disulfide liquid containing hydrogen sulfide is gasified and converted into an absorption liquid, and the gas is separated and condensed to obtain carbon disulfide with a hydrogen sulfide content of less than 0.1 wt%; Absorption of hydrogen sulfide.

[0028] combine figure 1 The present invention is further described: the gasification of the carbon disulfide liquid containing hydrogen sulfide at normal pressure and temperature of 50 to 60 ° C is transferred into the lowermost tray of absorption tower 1, and the number of trays of absorption tower 1 is based on the amount of ventilation, the content of hydrogen sulfide and the active ingredient of the absorption liquid. factors such as changes. The absorption liquid is transferred from the tower kettle to the top of the tower, and the temperature of the top of the tower is 45-60 °C. Part of the absorption liquid is continuously transferred to the regenera...

Embodiment 2

[0030] Will figure 1 The shown device is used for carbon disulfide to remove hydrogen sulfide, wherein the diameter of absorption tower 1 is 1000mm, there are 8 trays, and the weir height is 200mm.

[0031] The specific content of the absorption liquid is as follows: triethanolamine is 50wt%, ethylene glycol is 5wt%, and the rest is water.

[0032] The temperature is 60°C, and the gas containing hydrogen sulfide 0.5v / v% carbon disulfide flows at a flow rate of 1000m 3 / h is passed into the absorption tower 1, the tower still liquid of the absorption tower 1 is circulated to the top of the tower at 100kg / h, the regenerated liquid is merged into the circulation at 67kg / h, the exhaust gas from the top of the absorption tower is passed into the gas-liquid separator 3, and the liquid phase part It is automatically transferred to the absorption tower 1 by gravity, and the gas phase part is condensed at 30 ℃ to obtain carbon disulfide liquid, and hydrogen sulfide is not detected. T...

Embodiment 3

[0034] Will figure 1 The shown device is used for carbon disulfide to remove hydrogen sulfide, wherein the diameter of absorption tower 1 is 1000mm, there are 8 trays, and the weir height is 200mm.

[0035] The specific content of the absorption liquid is as follows: N-methyldiethanolamine is 30wt%, diethylene glycol is 5wt%, and the rest is water.

[0036] The temperature is 55°C, the gas containing hydrogen sulfide 0.5v / v% carbon disulfide and the flow rate is 1000m 3 / h into the absorption tower 1, the tower liquid of the absorption tower 1 is circulated to the top of the tower at 200kg / h, the regenerated liquid is merged into the circulation at 110kg / h, the exhaust gas from the top of the absorption tower is passed into the gas-liquid separator, and the liquid phase part relies on gravity It is automatically transferred to the absorption tower, and the gas phase part is condensed at 30°C to obtain carbon disulfide liquid, wherein the hydrogen sulfide content is 0.04wt%. ...

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Abstract

The invention relates to the technical field of hydrogen sulfide production, in particular to a method for removing hydrogen sulfide from carbon disulfide, which comprises the following steps: S1, separating to obtain carbon disulfide; s2, introducing the separated carbon disulfide into an absorption liquid to neutralize the hydrogen sulfide, standing the mixed liquid, taking a lower layer organic phase, distilling and condensing to obtain a condensate; s3, regenerating the absorption liquid to obtain regenerated liquid, and returning the regenerated liquid to the step S2 to serve as the absorption liquid. The method is easy to operate, and the carbon disulfide finished product with the hydrogen sulfide content lower than 0.1 wt% can be efficiently obtained.

Description

technical field [0001] The invention relates to the technical field of hydrogen sulfide production, in particular to a method for removing hydrogen sulfide from carbon disulfide. Background technique [0002] Hydrogen sulfide is a highly toxic substance. Researchers have studied a variety of treatment methods for hydrogen sulfide, such as strong alkali absorption to prepare sulfide and hydrosulfide, oxidation to prepare sulfur dioxide, sulfite or sulfur, and methanol absorption. Due to the composition, concentration and quantity of the mixed gas, the use of these methods is limited. The hydrogen sulfide can be oxidized and absorbed only when the remaining components of the hydrogen sulfide are discarded, and not only the remaining components of the hydrogen sulfide need to be recovered. In this case, the options for treatment are limited, and now physical methods are the main method. [0003] Carbon disulfide is an important chemical intermediate for the preparation of xant...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B32/72C01B17/02C01B17/16
CPCC01B32/72C01B17/021C01B17/167
Inventor 连许帅曹华伟武永堂张成赵二宝吴志强陆荣王晓庆屈晓磊周蕾赵丹丹柳亚玲李喜玲李智孟存瑞
Owner NINGXIA UNISPLENDOUR TIANHUA METHIONINE CO LTD
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